Physics: Forces and Motion

Study Notes

Gravity: the force of attraction between two objects with mass
Friction: the force that opposes motion between two surfaces in contact
Normal Force: the force exerted by a surface on an object that is in contact with it
Tension: the force exerted by a stretched string or wire
Air Resistance: the force that opposes the motion of an object through the air

An object at rest will remain at rest, and an object in motion will continue to move with a constant velocity, unless acted upon by an external force
Inertia: the tendency of an object to resist changes in its motion

The force applied to an object is equal to the mass of the object multiplied by its acceleration
F = ma (force = mass x acceleration)

For every action, there is an equal and opposite reaction
When one object exerts a force on another object, the second object always exerts an equal and opposite force on the first object

Displacement: the change in position of an object from its initial to its final position
Distance: the total length of the path traveled by an object
Velocity: the rate of change of an object's position with respect to time
Acceleration: the rate of change of an object's velocity
Speed: the magnitude of an object's velocity (scalar quantity)

Force is a push or pull that causes an object to change its motion or shape, measured in Newtons (N).
Force can be either external or internal.

Gravity: a force of attraction between two objects with mass.
Friction: a force that opposes motion between two surfaces in contact.
Normal Force: a force exerted by a surface on an object that is in contact with it.
Tension: a force exerted by a stretched string or wire.
Air Resistance: a force that opposes the motion of an object through the air.

An object at rest will remain at rest, and an object in motion will continue to move with a constant velocity, unless acted upon by an external force.
Inertia is the tendency of an object to resist changes in its motion.

Force (F) is equal to the mass (m) of an object multiplied by its acceleration (a): F = ma.
The unit of force is the Newton (N), which is equal to kg·m/s².

For every action, there is an equal and opposite reaction.
When one object exerts a force on another object, the second object always exerts an equal and opposite force on the first object.

Displacement: the change in position of an object from its initial to its final position.
Distance: the total length of the path traveled by an object.
Velocity: the rate of change of an object's position with respect to time, measured in meters per second (m/s).
Acceleration: the rate of change of an object's velocity, measured in meters per second squared (m/s²).
Speed: the magnitude of an object's velocity, measured in meters per second (m/s).